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223 papers · 1 filter
Involutions on surfaces
Daniel Dugger
We use equivariant surgery to classify all involutions on closed surfaces, up to isomorphism. Work on this problem is classical, dating back to the nineteenth century, but some que…
Validating gravitational-wave detections: The Advanced LIGO hardware injection system
C. Biwer, D. Barker, J. C. Batch +44
Hardware injections are simulated gravitational-wave signals added to the Laser Interferometer Gravitational-wave Observatory (LIGO). The detectors' test masses are physically disp…
Electromagnetic Angular Momentum
Masud Mansuripur
This article was published as Sec.5 of the "Roadmap on Structured Light" in Journal of Optics 19 (2017) 013001. Section 5 describes the essential elements of the classical theory o…
Electromagnetic Force and Momentum
Masud Mansuripur
This article was published as Sec.4 of the "Roadmap on Structured Light" in Journal of Optics 19 (2017) 013001. Section 4 describes the essential elements of the classical theory o…
Radial solutions of a fourth order Hamiltonian stationary equation
Jingyi Chen, Micah Warren
We consider smooth radial solutions to the Hamiltonian stationary equation which are defined away from the origin. We show that in dimension two all radial solutions on unbounded d…
On the Dichotomy between Normal and Dwarf Ellipticals
James M. Schombert
Using images from the SDSS DR13 library, we examine the structural properties of 374 bright (classed E0 to E6) and dwarf ellipticals (classed dE(nN) to dE(N)). The sample combines…